Electric cloth-cutting machine.



No. 858,692. ,PATENTED JULY 2, 1907. E. M. WARING. BLEGTRIG CLOTH GUTTING MACHINE.

APPLIOATION FILED AUG.5. 1905.

2 SHEETS-SHEET 1.

ELECTRIC CLOTH CUTTING MACHINE'. APPLIOATION FILED ma. 1905.

2 SHEETS-SHEET 2.

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{SJQWARD M. WARING,

OFNEW YORK, N. Y.

ELECTRIC CLOTH-CUTTING- MACHINE.

Application led August 5 To all whom it may concern:

Be it known that I, EDWARD M. WARING, a citizen of theUnited States of America, and aresident of the city of New York, county of Kings, and State of New York, in the borough of Brooklyn, have invented certain new and useful Improvements iny Electric Cloth-Cutting Machines, of which the following is a specification.

This invention relates to electrically operated cloth cutting inachinesfand particularly to that class of said machines wherein the cutting is done by a reciprocating knife.

The objects of the invention are to render the machine easilyaoperated, to simplify the number'of parts, and to obtain a compact 'construction well' balanced and of ,a symmetricall and attractive appearance. In

' order to accomplish these objects, the motor and its field coil are arranged on either side of the mechanism operating the reciprocating knife so .thatthe center of gravity. ofthe 'entire upper portion of the machine is approximately over the center of a column on which these upper parts rest. Furthermore by this arrangement of the driving mechanism interposed between the armature and the lield coil, the machine is made sym* metrical in appearance and the operator gets a full view of the edge of the knife when standing in an erect natural position By this arrangement, a longer stroke of the knife is obtained, and the machine still kept within a desirable height.

Further valuable details in the construction and .arrangement of parts will appear as the specification is a detail View, partly in section, 'ofthe connection between the motor and knife and adjacent parts. Fig. 5 is a detail view, partly inv section, of the guides and adjacent parts. Fig. 6 is, a bottom plan view l of the base. Fig. 7 is a detail view of the means for sharpening the knife.

l indicates the base, 2 the column upon which the machine is mounted, 3 thecutting member or knife, 4 the motor, and 5 the field coil of the same.

6 indicates the pitman connecting the motor and the knife.

The base l is in the shape voi athin circular plate provided with the pockets 7 `for the reception of the ball bearing rollers 8 upon which it rests'.v` 1n order to render the insertion of the base'under the cloth easy and to prevent the edges of the same froincatching,v the base is surrounded by a supplemental frame 9 in which it is eccentrically located. This supplemental frame y:is preferably of oval contour and provided with aroundeP Specification of Letters Patent.

Patented Jury e, 1907. .1905.' sm'nNo. 272,902.

edge so as not to present any obstacle while being led under the cloth, and in order to gather the layers of the cloth more readily the greater width of this frame is in front as indicated at 10.

The connection between the base and the frame is formed by means of the flat springs 11, which are located radially from the center of the '.base, and as will be seen ,from Fig. 6, placed near the forward and rear parts of the same. This arrangement together with the fact that the lbase is of a slightly less diameter than the openand the structure thereon, and as the frame barely leading of the machine is rendered very smooth and easy. v

It will be observed that the ends 12 of the lugs forming the pockets 7'protrude underthe edge of the frame, thus acting as'stops for any upward movement of the base.

13 indicates openings for the friction rollers and 14 is .a recess for the receptionof the column 2, which is fastened to the base by means of screws.

The column supports the upper parts of the machine and acts as a guide for the knife 3, having a groove 15 receiving the' saine. The lower part of the column is provided with a raised portion 46 to facilitate the cutting of the lowermost layers of cloth and an aperture 16 for the passage of the knife, to which corresponds the aperture 17 in the base, and 'is made as thin as practicable with its forward edges 18 beveled off to insure ready passage through the cloth.

The upper end of the column enters a recess 19 in the supporting bracket 20 to which it is screwed. The saidbracket is provided with lugs as 21, through which Opass the bolts 22 for the fastening of the pole pieces 23 of the field coil 5.

24 indicates the armature, 25 the commutator, 26 the and the bracket 20 is provided with cut-out portions 29 (see Fig. 5) for the same. i

l will new describe the connection between the motor and the knife, which is best seen in Figs. 1, 4 and5.

To the armature shaft 30 is keyed the crank disk 31 forming the inner race way for the ball bearing 32, and carrying the counter weight 45, the outer race way being in two parts 33 and 34 and screwed into the stationary yoke 28'. The one end of the pitman G is connected to the crank disk' at 35, while the other end is connected to the cross head 36, which is provided with a recess 37 for the reception of the knife 3, which is adjustably connected to the cross head by means of slot and bolt 38 and 39. Fig. 5 shows an opening 4() in the bracket 20, through which the position of the knife touches the cutting table, but does not rest thereon, the i brushes carried bythe bracket 27, in which the one end of the motor shaft is journaled, while the other end to which the pitman 6 is connected is journaled in the i yoke 28. The said yoke is carried by the pole' piecesing in the frame allows of a slight vibration of the base may be adjusted. The cross head moves vertically and is guided by-means of the guides 41, which are held in position by pins 42 (see Fig. l) and adjusted by means of the bolts 43 and 44. y

The above described construction renders the vreciprocating motion of the knife very smooth and iioise less, as is also the rotation of the crank disk by reason of the ball bearing It`.wili be noted that compaia-v tively few parte are employed to accomplish the desired result.A

Surrounding the knife and guided by the beveled forward edges of the column, is the 'pressure'foot 47 for the pressing down of the cloth, thestem 48 oi the said pressure foot passes through the block,49 and is vertically adjustable by means of the thumb-screw 50.

' The biocl: 49 enters a recess 5l in bracket 20, which is .provided with an aperture 52 for the p/assa'ge of the stem48.-

53 is the handle of the machineand 54 a lamp`for illuminating purposes. In close proximity to 'the saidr 'In order to be able to sharpen theknife without removing it from the machine, I provide a sharpening means as the two abrasive wheels 57 and 58, one on each side of the knife mounted on the shaft 59 carried by the support 60, adjustably fastened on the stem of the pressure foot and adapted tobe swung into and out oi con-- tact with the knife, The two wheels are set at an an# gie to the knife, and are rotated positively from the driving wheel 6l, which, in turn, is rtated by friction with thearrnature. The shaft 59 is driven from the wheel 6l by means ofthe flexible shaft 62.

The friction wheel is carried by the arm 63 which is hinged at 64 to the bracket 65 a spring 66 on the'said bracket normally keeping the wheel in contact with the armature. When it is desired to stop the abrasive wheels from rotating while the machine is in operation, the operator will turn the arm 63 down and out of frictional Contact with the armature.

It will be noted that in the above described construction of a machine oi this type, the upper parts of the machine take up but little space vertically, hence a longer stroke of the knife can be obtained and the machine still be kept within a desirable height. Ii, however, it is desired to decrease the width of the ma chine in order that the operator might get a better view of his work, and where a shorter stroke of the knife is perrnissible,.the type of machine illustrated in Fig. 3 maybe preferred. In this figure I have shown the motor and fieldy coil turned at 90 from the position shown in Fig. l, and 90 in the vertical plane, thus increasing the height of the machine andmaking it narrower in width. The number of parts in the machine and their position in the structure is but little changed.

soenna In this View 5i indicates the switch, while the current is led in et 65, 66; the base is not shown in this figure,

neither is the sharpening device, as both of these elej ments are ofthe same construction as shown in Fi". 1.

It will oi course be understood that whilel have shown and described a concrete construction-o? the machine, I do not wish to be understood as limiting myself to the exact structure shown, as changes may oi course be made without departing irom'the spirites tho invention.

What is claimed is:

1. In un clcciric cutting machine, the vcombination .of n vertically reciprocating kniic, an cicctric motor-'ildfiifi en armature und a iicid coil for drivingsiiid knife, abrasive wheels, means for driving the' sold abrasive wheels ot will by friction with the urmnturc-oi suid motor.

2. In n n electric cutting machine, the combination oi n base and vertical'column with straight knife partly pro jecting therefrom, u pressure foot, abrasive whccls driven by a ilexibicshait and udjustubly carried by thc sold pressure foot.

3. In an electric cutting mochinc, the combination oi' :i baseand, vcrtic'ul column arising therefrom, u struight `knife partly projcctlngiro'm said column` und u pressure `foot vertically adjustable about said knichud column,

abroslve'wheeis adapted to sharpen sold knife und vertically adjustable on sold pressure foot.

4. In an electriccutting machine, the combination oi' u base und vertical column arising tbcreiromyni-straight knife partly projecting from` uuid coiumn,"1.prcssure foot vertically adjustable .about said knife andcolumn, :ihrssivc wheels adapted to sharpen suld knife and vertically adjustable on said pressure fooi', und mcuns for driving saidl abrasive Wheels .at will.

' 5; In an electric cutting: machine, the` comblnution of u fiat base and vertical standard nrisiiig therefrom, n, nioi'oi, u vertical knife' partly projecting from said stundurd, abrasive wheels adoptedA to 'sharpen' siiid "knifc,. and n iiexlble shaft ior'driving the suid abrasive ,whccia receiving power from thc said motor.

6. in un electric cutting machine, the combination with a circular base, an outer supplemcntulframe, the Suid 'base being located ecccntrically in' thc suid irxunc in tbc renr part of the same.

7. In an electric cutting nmohinc, thc combination with a circular base. an outer supplemental ifrnmc, the mild b'aso being located ccccntricully in the sold irnmc, townrd the rcar port of the same, yielding means connecting ihc said base `and frame allowing of n slight vlbruiou oi ille former. thc Suid yielding means beim.r located rudiully ucar the forward und rcur portions of ilu: suill buse.

ii. in an electric cuttingy muchiuc, thc combination willi a circular lmsc,` un outer supplemental ironic of ovul coutour, the Suid buse being locutcd ecccniriczllly n ille suiil frame in the rear port of thc sonic. yieldingr moons councctingihc Suid bnsc und irumc in such munucr us lo prevent the lnitcr from touiiinc ihc opcruliuf;- table.

il. ln un electric cutting machine. thc combination willi u moior, u column supporting said motor, :i circular bus-c cccentricnlly locuicd in un ovni supplimcniul frumc, hoving a centrally located rcccss for the reception o1' illu Suid column. rudlully locuicrl springs ou thc said buse connecting thc sumo to the said supplemental frziinc iu such u mnnncr as to prcvcnt thc lntlcr from touching thc opor-ating iublc. the Suid springs boing; locuicil ucur lhc forward und rcur portions of thc Suid busc.

Signed :it New York city this 4th day oi August, 1005.

EDWARD M. WARTNG.

Witnesses:

Ronnn'r S. 13Min,. ANNA WissnMANN. 

